CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS

12 Months Ended

Jan. 31, 2019

Cash, Cash Equivalents, and Short-term Investments [Abstract]

Cash, Cash Equivalents and Short-term Investments

CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS

The following tables summarize our cash, cash equivalents, and short-term investments as of January 31, 2019 and 2018:

	January 31, 2019
(in thousands)	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cash and cash equivalents:
Cash and bank time deposits	$	359,266	$	—	$	—	$	359,266
Money market funds	10,709		—		—		10,709
Total cash and cash equivalents	$	369,975	$	—	$	—	$	369,975
Short-term investments:
Bank time deposits	$	32,329	$	—	$	—	$	32,329
Total short-term investments	$	32,329	$	—	$	—	$	32,329

	January 31, 2018
(in thousands)	Cost Basis		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Cash and cash equivalents:
Cash and bank time deposits	$	337,756	$	—	$	—	$	337,756
Money market funds	186		—		—		186
Total cash and cash equivalents	$	337,942	$	—	$	—	$	337,942
Short-term investments:
Corporate debt securities (available-for-sale)	$	2,002	$	—	$	—	$	2,002
Bank time deposits	4,564		—		—		4,564
Total short-term investments	$	6,566	$	—	$	—	$	6,566

Bank time deposits which are reported within short-term investments consist of deposits held outside of the U.S. with maturities of greater than 90 days, or without specified maturity dates which we intend to hold for periods in excess of 90 days. All other bank deposits are included within cash and cash equivalents.

As of January 31, 2018, all of our available-for-sale investments had contractual maturities of less than one year. Gains and losses on sales of available-for-sale securities during the years ended January 31, 2019, 2018, and 2017 were not significant.

During the years ended January 31, 2019, 2018, and 2017, proceeds from maturities and sales of available-for-sale securities were $33.1 million, $8.7 million, and $52.8 million, respectively.